From requirement it is possible to generate UseCase by one-to-one correspondence.
It has synchronization information, so even the name of the requirement is changed or a new requirement is added,
it is possible to change the name of corresponding UseCase or generate UseCase corresponding to the new requirement.
Also it generates data to display the corresponding requirement in the Requirement tab of UseCase properties in Enterprise Architect.
It is possible to generate requirement from UseCase as well.
It is possible to create class by one-to-one correspondence with a term in glossary. This does not hold synchronization information.